He's got the typical bucket in his stall (I think they're something like 16 gallons?), and automatic water in his field. I've been noticing that if he's brought into his stall by 6:30pm, and I go out around 8:30pm - his stall bucket is dry as a bone. I've checked him a few days in a row, and his bucket has been low every day.
I tried taking off his blanket (thinking he was too hot), but his bucket was dry all the same. I tried putting a lighter blanket on (we live in Canada, so it does get a little nippy), and the same results.
I've never had to double bucket a horse of my own before - so I'm just wondering if there could be a possible underlying issue? Or do I just have a thirsty boy on my hands?